This structure makes the alloy more brittle than the eutectoid pearlite structure. The micrograph shows the microstructure for an Fe - 1.4 wt % C steel, the white regions being cementite.

Changing the carbon content of the alloy changes the microstructure of the pearlite and hence the ... As the temperature is reduced, the austenite composition moves towards the eutectoid value, and at ...